Watanabe Kohei, Kouzaki Motoki, Moritani Toshio
Laboratory of Neuromuscular Biomechanics, School of International Liberal Studies, Chukyo University, Yagotohonmachi, Showa-ku, Nagoya, 466-8666, Japan.
Laboratory of Neurophysiology, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan.
Muscle Nerve. 2015 Sep;52(3):404-11. doi: 10.1002/mus.24544. Epub 2015 Jan 5.
We investigated the effect of workload and the use of pedal straps on the spatial distribution of neuromuscular activation within the rectus femoris (RF) muscle during pedaling movements.
Eleven healthy men performed submaximal pedaling exercises on an electrically braked ergometer at different workloads and with or without pedal straps. During these tasks, surface electromyograms (SEMGs) were recorded from the RF using 36 electrode pairs, and central locus activation (CLA) was calculated along the longitudinal line of the muscle.
CLA moved markedly, indicating changes in spatial distribution of SEMG within the muscle, during a crank cycle under all conditions (P < 0.05). There were significant differences in CLA among different workloads and between those with and without pedal straps (P < 0.05).
These results suggest that neuromuscular activation within the RF is regulated regionally by changes in workload and the use of pedal straps during pedaling.
我们研究了工作量和使用踏板绑带对蹬踏运动期间股直肌（RF）内神经肌肉激活的空间分布的影响。
11名健康男性在电动刹车测力计上以不同工作量进行次最大强度蹬踏运动，且使用或不使用踏板绑带。在这些任务期间，使用36对电极从RF记录表面肌电图（SEMG），并沿肌肉的纵线计算中心位点激活（CLA）。
在所有条件下，CLA在曲柄周期内显著移动，表明肌肉内SEMG的空间分布发生变化（P < 0.05）。不同工作量之间以及使用和不使用踏板绑带之间的CLA存在显著差异（P < 0.05）。
这些结果表明，蹬踏过程中RF内的神经肌肉激活受工作量变化和踏板绑带使用的局部调节。
